package com.zhcx.zhcxlibrary.utils;

import android.app.Activity;
import android.app.ActivityManager;
import android.content.Context;

import java.util.Iterator;
import java.util.Stack;

/**
 * ProjectName：BranchWisdomBus
 * PackageName：com.zhcx.wisdombus.utils
 * description:页面管理
 * Date：2016/9/12 17:59
 * Author：Steven
 * ClassName:AppManager
 **/
public class AppManager {
    public static Stack<Activity> activityStack;
    private static AppManager instance;

    /**
     * 单一实例
     */
    public static AppManager getAppManager() {
        if (instance == null) {
            instance = new AppManager();
        }
        return instance;
    }

    /**
     * 添加Activity到堆栈
     */
    public void addActivity(Activity activity) {
        if (activityStack == null) {
            activityStack = new Stack<Activity>();
        }
        activityStack.add(activity);
    }

    /**
     * 获取当前Activity（堆栈中最后一个压入的）
     */
    public Activity currentActivity() {
        if (null != activityStack && activityStack.size() != 0) {
            Activity activity = activityStack.lastElement();
            return activity;
        } else {
            return null;
        }
    }

    /**
     * 获取当前Activity的前一个Activity
     */
    public Activity preActivity() {
        int index = activityStack.size() - 2;
        if (index < 0) {
            return null;
        }
        Activity activity = activityStack.get(index);
        return activity;
    }

    /**
     * 结束当前Activity（堆栈中最后一个压入的）
     */
    public void finishActivity() {
        Activity activity = activityStack.lastElement();
        finishActivity(activity);
    }

    /**
     * 结束指定的Activity
     */
    public void finishActivity(Activity activity) {
        if (activity != null) {
            activityStack.remove(activity);
            activity.finish();
            activity = null;
        }
    }

    /**
     * 结束指定类名的Activity
     */
    public void finishActivity(Class<?> cls) {
        try {
            for (Activity activity : activityStack) {
                if (activity.getClass().equals(cls)) {
                    finishActivity(activity);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        for (int i = 0, size = activityStack.size(); i < size; i++) {
            if (null != activityStack.get(i)) {
                activityStack.get(i).finish();
            }
        }
        activityStack.clear();
    }

    /**
     * 返回到指定的activity
     *
     * @param cls
     */
    public void returnToActivity(Class<?> cls) {
        while (activityStack.size() != 0)
            if (activityStack.peek().getClass() == cls) {
                break;
            } else {
                finishActivity(activityStack.peek());
            }
    }

    /**
     * 是否已经打开指定的activity
     *
     * @param cls
     * @return
     */
    public boolean isOpenActivity(Class<?> cls) {
        if (activityStack != null) {
            for (int i = 0, size = activityStack.size(); i < size; i++) {
                if (cls == activityStack.peek().getClass()) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context, boolean isBackground) {
        try {
            finishAllActivity();
            ActivityManager activityMgr = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            activityMgr.restartPackage(context.getPackageName());
            android.os.Process.killProcess(android.os.Process.myPid());
        } catch (Exception e) {
        } finally {
            // 注意，如果您有后台程序运行，请不要支持此句子
            if (!isBackground) {
                System.exit(0);
            }
        }
    }

    /**
     * 结束指定的Activity
     */
    public void getActivity(Activity activity) {
        if (activity != null) {
            activityStack.remove(activity);
            activity.finish();
            activity = null;
        }
    }

    /**
     * 得到指定类名的Activity
     */
    public Activity getActivity(Class<?> cls) {
        for (Activity activity : activityStack) {
            if (activity.getClass().equals(cls)) {
                return activity;
            }
        }
        return null;
    }

    /**
     * 判断当前类是否已经存在
     *
     * @param paramClass
     * @return
     */
    public boolean queryActivity(Class<?> paramClass) {
        if (this.activityStack != null) {
            Iterator localIterator = this.activityStack.iterator();
            while (localIterator.hasNext())
                if (((Activity) localIterator.next()).getClass().equals(paramClass))
                    return true;
        }
        return false;
    }

    public void finishAllActivityExceptLast() {
        while (true) {
            int j;
            try {
                if (this.activityStack == null)
                    continue;
                int i = this.activityStack.size();
                j = 0;
                if (j >= i)
                    continue;
                if ((this.activityStack.get(j) != null) && (j != i - 1)) {
                    ((Activity) this.activityStack.get(j)).finish();
                    this.activityStack.clear();
                    this.activityStack = null;
                    return;
                }
            } catch (Exception localException) {
                localException.printStackTrace();
                return;
            }
            j++;
        }
    }
}
